Whats the best glue to use for gluing tubes in blanks?
Most people use either cyanoacrylate (CA) a.k.a. superglue, epoxy or polyurethane (PU). Any one of those can give good results, if properly used. The important thing is to assure a good bond, and proper fill (no gaps between the tube and the barrel). CA glue is quick, and can be worked a few minutes of settling time. It is best to use FLEXIBLE CA glue, or GAP-FILLING. Do not use thin CA! Epoxy comes in several ‘speeds’: 5-min epoxy is good because you can turn the barrel after 1/2 hour drying time. Longer cure time epoxies are also available. PU needs to dry overnight, but it has a wonderful property in that it expands as it dries. That helps assure a good fill! It is moisture activated, therefore not the best for plastics, in some climates at least.